18979616

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{251}}^1$

素因数の和:417

約数の個数: 48

約数和(自身を含む): 40007520

約数和(自身を除く): 21027904

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 68, 136, 139, 251, 272, 278, 502, 544, 556, 1004, 1112, 2008, 2224, 2363, 4016, 4267, 4448, 4726, 8032, 8534, 9452, 17068, 18904, 34136, 34889, 37808, 68272, 69778, 75616, 136544, 139556, 279112, 558224, 593113, 1116448, 1186226, 2372452, 4744904, 9489808, 18979616]

約数ペア:

[(1, 18979616), (2, 9489808), (4, 4744904), (8, 2372452), (16, 1186226), (17, 1116448), (32, 593113), (34, 558224), (68, 279112), (136, 139556), (139, 136544), (251, 75616), (272, 69778), (278, 68272), (502, 37808), (544, 34889), (556, 34136), (1004, 18904), (1112, 17068), (2008, 9452), (2224, 8534), (2363, 8032), (4016, 4726), (4267, 4448)]